<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <style>
        p{
            color: green;
        }
        .my-color{
            color: red;
        }
        #home{
            color: blue;
        }
    </style>
</head>
<body>
    <p id="home" class="my-color">这是一个段落</p>
</body>
</html>